QSC Audio specifications NEW! SC-424, Cinema Loudspeaker System, Features, Specifications

NEW! SC-424

Cinema Loudspeaker System

Features

•Four-way selectable, tri or quad- amplified screen channel system

•Unique HF/VHF diaphragm has less mass than traditional diaphragms resulting in exceptional dynamic range, extended high frequency response and lower distortion

•LF-4215 is constructed of MDF and is heavily braced

•Low-distortion waveguides provide highly articulate dialogue

•Shallow depth (20”) facilitates installation

•THX™ approved for professional cinema applications

Developed specifically for the unique requirements
of professional motion picture playback, the SC-424
extends QSC’s commitment to the cinema market.
As a member of the DCS Digital Cinema Speaker				Specifications	SC-424
Series, the SC-424 is a four-way, selectable tri or
quad-amplified screen channel loudspeaker system				Nominal Coverage	90° horizontal x +20 to -30° vertical
comprised of two main units - the MHV-1090 mid-
				Frequency Range (-6 dB)	33 - 20 kHz
high-very high-frequency system and the LF-4215
				Active Crossover Frequencies	250, 1700 and 6000 Hz, 24 dB per octave
low-frequency system.
The MHV-1090 mid-high-very high system features
					LF-4215	MHV-1090
a high output, horn loaded 10" midrange cone
driver and a coaxial neodymium high-frequency/very				Impedance	4Ω	MF: 8Ω HF: 8Ω VHF: 8Ω
high-frequency compression driver . The MHV-1090				Sensitivity 1 watt /1 meter,	99.5 dB	Tri-amp	Quad-amp
includes a driver protection network and a passive
				half space		MF:105 dB	MF: 105 dB
crossover for tri-amp operation. The protection circuitry						HF/VHF: 110 dB	HF: 110 dB
prevents low-frequency signals from damaging the							VHF: 110 dB
high-frequency and very high-frequency driver. A
				Maximum Input Power1
high power 10" cone driver allows operation as low
as 250 Hz and the advanced phase plug coupling				8 hours of 6 db crest factor	800 W RMS	MF: 275 W RMS	MF: 275 W RMS
permits a crossover point of up to 1800 Hz to the				IEC 268 noise spectrum		HF/VHF: 230 W RMS	HF: 150 W RMS
high-frequency horn. This ensures that most of the							VHF: 80 W RMS
dialog range is reproduced by a single element, for				2 hours of 6 db crest factor	1000 W RMS	MF: 800 W RMS
unmatched intelligibility.
				pink noise, 50 Hz - 20 kHz,		HF/VHF: 500 W RMS maximum
The coaxial neodymium high-frequency/very high-				AES method
frequency compression driver provides a dramatic				Recommended	1600 W RMS maximum	MF: 800 W RMS
improvement in dynamic response, clarity and				Amplifier Power		HF: 500 W RMS
transparency. The annular high-frequency diaphragm						VHF: 300 W RMS maximum
covers the frequency range between 1800 and				Recommended Processing	Subsonic filter below 30 Hz,	4th order LR crossover at 250, 1700 and
7000 Hz with a smooth, linear response. The large
					>18 dB per octave	6000 Hz via QSC DCM or QSControl.net
diaphragm excursion	of +/-0.8 mm		results in high
				Connectors	Barrier strip screw terminals accept up to #10 AWG stranded wire
output and increased power handling. The very high-
frequency driver covers the frequency range from				Transducers	Two 15" (381mm) high	MF: 10" high-effeciency, horn-loaded
7000 to 22,000 Hz and eliminates the dome break					efficiency, extended bass	cone with pahse plug
up of conventional drivers that can cause resonance					woofer featuring a 4" copper	HF/VHF: coaxial neodymium compression
and harsh, metallic sound.					voice coils	driver with 3.5" (90 mm) HF diaphram
						and 1.75" (44 mm) VHF diaphram
The LF-4215 dual	15”	(381 mm)	low-frequency
				Enclosure	Quasi B4 alignment, ported	Tilt/Pan Bracket
enclosure is designed specifically to address the
					enclosure with fully flared	±10° vertical tilt
extended low-frequency response required for cinema
					ports, symmetrical port design,	±10° horizontal pan
applications. The LF-4215 covers the frequency range
					tuned to 36 Hz, constructed
from 35 Hz to 250 Hz. Close coupled woofers (CCW),
					of MDF and heavily braced.
with their tight spacing between woofers, improves
					Features vandal resistant
coupling and keeps coverage angles wide over a greater					woofer mounting bolts
frequency range than more widely spaced designs.
				Dimensions (HWD)	36" x 30" x 20.3"	39" x 30" x 20"
The SC-424 is designed for ease of installation. The
					(910 mm x 762 mm x 516 mm)	(990 mm x 762 mm x 508 mm)
MHV-1090 components		come pre-assembled to
				Weight - Net	172 lbs (78 kg)	84 lbs (38.5 kg)
reduce field assembly time. Three bolts are all that are
				System Weight	256 lbs (116 kg)
required to secure the MHV-1090 to the top of the
LF-4215 enclosure.				Baffle Cut-Out	76" x 32"
THX is a trademark of THX Ltd.
				1) Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz - 20 kHz band limiting, 6 dB signal crest factor.